Lennox Baltic BCK 020, Руководство по установке, эксплуатации и техническому обслуживанию

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IOM / ROOFTOP BALTIC Series -
08
03 - E Page 99
MAINTENANCE PLAN
TA
S
K
Check HP / LP safety switches Check out
door fans and fan guards
Check position of all sensors Check and clean if necessary all fresh air grilles Check indoor and out
door coils, clean if
necessary Check electric heater element for exces- sive corrosion Check anti-vibration mountings, for wear and tear
.
Check refrigeration circuit for traces of acid in the oil Check Glycol concentration in the HWC circuit Check defrost cycle with 4-way valve inversion. Gas burner module check for corrosion Sweeping and cleaning the gas burner Gas supply pressures / connections checks Gas regulation valve settings Check gas burner safety switches
OPERA
TING MODE
Inst
all manifold gauges on the circuit to be checked. Shut down
the axial fans and wait for the HP switch to shut down the compressor: 29bar (+1 / -0) auto-reset 22bar (+ - 0.7) Reconnect fans. Switch of
f the centrifugal supply fan and wait
for the LP switch to cut out: 0.5bar (+ - 0.5) reset 1.5bar (+-0.5). Check the fan blades conditions and all fan guards and protec- tions Check the good positioning and operation of all sensors of all sensors. Check the values given in the control system. Replace sensor if necessary Check the fresh air grilles (if fitted). If dirty or damaged, remove them from unit and clean with high pressure water cleaner
. Refit
on unit once clean and dry
.
V
isually check the coils for dirt. If not too dirty
, cleaning with a
light brush may be enough (W
ARNING: Fins and copper tubes
are very fragile!
Any damage WILL
reduce the performances of
the unit). If very dirty
, deep industrial cleaning is required using
de-greasing agent
s.(External contractors must be called).
Isolate the unit; Pull the electric heater out of the heater module box and check the resist
ances fo traces of corrosion; Replace
resist
ance as required;
V
isually check anti-vibration mountings on compressors and
centrifugal fan. Replace if damaged. Take a sample of oil from the refrigeration circuit. Check the glycol concentration in the pressurised water circuit. ( a concentration of 30% gives a protection down to aprox. - 15°C) check the circuit pressure Switch the unit to heat pump mode. Change the set point to obt
ain the st
andard defrost mode and reduce the cycle time to
the min value. Check the operation of the defrost cycle. Pull out the burner to access the tubes (refer to Gas burner section in the IOM) Clean the in-shot burners and the blower wheel lightly with a brush. Sweep the flue and flue box. Wipe-of
f the dust from the
housing of the motor
. Clean combustion air inlet louvers Pull-out
baf
fles from the tubes, sweep the tubes
CHECK FLUE BOX GASKET refer to Gas burner section in the IOM for det
ails
refer to Gas burner section in the IOM for det
ails
refer to Gas burner section in the IOM for det
ails
6
YEARL
Y
E
S
T
IM
A
T
E
D
MONTHL
Y
QUARTERL
Y
M
O
N
T
H
LY
B
4
T
IM
E
WINTER
(mn)
15
0
5
0
5
0
5
0
1h if cleaning
0
1h if
replacement
0
1h if
replacement
∆ ∆
30
∆
30
∆
30
∆
30
∆
15
∆
30
∆
30